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(ask) how to create UDF for inlet velocity profile

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Old   June 8, 2018, 12:17
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Old   August 8, 2019, 05:40
Default negatif values
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Elvire Katramiz
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Hello!
I have a question concerning the velocity profile.
I did the UDF function and compiled it in ANSYS fluent, however I need to assign it to a BC of inlet velocity? if so, it only gives positive values of the velocity... how can the velocity change from + to - on a boundary and thus change the direction of the velocity vectors?
should I change the type of boundary conditions?

Thank You !!
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Old   August 8, 2019, 08:49
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if we speak about inlet boundary condition ->
positive velocity means flow inside domain
negative velocity means flow onside domain through inlet

best regards
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